Optical System: Infinite Optical System Viewing Head: Compensation Free Trinocular Head, Inclined at 30°, 360° Rotatable, Interpupilary Distance 48-75mm 1 PC Compensation Free Binocular Head, Inclined at 30°, 360° Rotatable, Interpupilary Distance 48-75mm 4 PCS Eyepiece: Extra Wide Field Eyepiece EW10×/ 20 10PCS Nosepiece: Inverse Quintuple Nosepiece Objective: Infinite Plan Achromatic Objectives 4X/0.1, W.D.17.3mm, 10X/0.25, W.D. 10mm, 20X/0.40, W.D. 5.1mm, 40X/0.65, W.D. 0.54mm (spring), 100X/1.25, W.D. 0.13mm (spring oil), Condenser: Swing Condenser N.A.0.9/ 0.25 Focusing: Coaxial Coarse & Fine Focus Adjustment, Fine Division 0.002mm Stage: Double Layers Mechanical Stage 185×142mm, Moving Range 75×55mm Kohler Illumination: External Illumination, Halogen Lamp 24V/ 100W Pointer: Green LED Pointer , Brightness Adjustable |